In the UK, for example, a bachelor's degree is the first degree awarded by a university and is typically followed by a master's degree. A postgraduate certificate is typically a one-year qualification, and is not considered equivalent to a master's degree.
In the US, a postgraduate certificate is typically a qualification offered by a community college or vocational school, and is not considered equivalent to a bachelor's degree.
However, it's important to note that the specific value and recognition of postgraduate certificates can vary depending on the institution offering the qualification, the subject area, and the specific requirements of employers or further education providers.